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Finding the Fourth Proportional to 103,740.80, 155,614.40 and 40,558.40

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Solution

The fourth proportional to 103,740.80, 155,614.40 and 40,558.40 is: 60,838.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,740.80 : 155,614.40 = 40,558.40 : x
  2. Step 2: Convert to fraction form
    103,740.80/155,614.40 = 40,558.40/x
  3. Step 3: Cross multiply
    103,740.80x = 155,614.40 × 40,558.40
  4. Step 4: Simplify right side
    103,740.80x = 6,311,471,080.96
  5. Step 5: Solve for x
    x = 6,311,471,080.96/103,740.80
  6. Step 6: Final answer
    x = 60,838.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.